Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 246,000	$ 252,000	$ 713,000	$ 481,000
Unrecognized tax benefits	4,300,000		4,300,000
Unrecognized tax benefits that would impact effective tax rate	0		0
Decrease in unrecognized tax benefits is reasonably possible	$ 0		$ 0